diff --git a/MdeModulePkg/Universal/Network/SnpDxe/Stop.c b/MdeModulePkg/Universal/Network/SnpDxe/Stop.c
new file mode 100644
index 0000000000..63725237b7
--- /dev/null
+++ b/MdeModulePkg/Universal/Network/SnpDxe/Stop.c
@@ -0,0 +1,118 @@
+/** @file
+Copyright (c) 2004 - 2007, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module name:
+  stop.c
+
+Abstract:
+
+Revision history:
+  2000-Feb-09 M(f)J   Genesis.
+
+**/
+
+#include "Snp.h"
+
+
+/**
+  this routine calls undi to stop the interface and changes the snp state
+
+  @param  snp   pointer to snp driver structure
+
+
+**/
+EFI_STATUS
+pxe_stop (
+  SNP_DRIVER *snp
+  )
+{
+  snp->cdb.OpCode     = PXE_OPCODE_STOP;
+  snp->cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
+  snp->cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
+  snp->cdb.DBsize     = PXE_DBSIZE_NOT_USED;
+  snp->cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
+  snp->cdb.DBaddr     = PXE_DBADDR_NOT_USED;
+  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
+  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
+  snp->cdb.IFnum      = snp->if_num;
+  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;
+
+  //
+  // Issue UNDI command
+  //
+  DEBUG ((EFI_D_NET, "\nsnp->undi.stop()  "));
+
+  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);
+
+  if (snp->cdb.StatCode != PXE_STATCODE_SUCCESS) {
+    DEBUG (
+      (EFI_D_WARN,
+      "\nsnp->undi.stop()  %xh:%xh\n",
+      snp->cdb.StatCode,
+      snp->cdb.StatFlags)
+      );
+
+    return EFI_DEVICE_ERROR;
+  }
+  //
+  // Set simple network state to Started and return success.
+  //
+  snp->mode.State = EfiSimpleNetworkStopped;
+  return EFI_SUCCESS;
+}
+
+
+/**
+  This is the SNP interface routine for stopping the interface.
+  This routine basically retrieves snp structure, checks the SNP state and
+  calls the pxe_stop routine to actually stop the undi interface
+
+  @param  this  context pointer
+
+
+**/
+EFI_STATUS
+EFIAPI
+snp_undi32_stop (
+  IN EFI_SIMPLE_NETWORK_PROTOCOL *this
+  )
+{
+  SNP_DRIVER  *snp;
+  EFI_TPL     OldTpl;
+  EFI_STATUS  Status;
+
+  if (this == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  switch (snp->mode.State) {
+  case EfiSimpleNetworkStarted:
+    break;
+
+  case EfiSimpleNetworkStopped:
+    Status = EFI_NOT_STARTED;
+    goto ON_EXIT;
+
+  default:
+    Status = EFI_DEVICE_ERROR;
+    goto ON_EXIT;
+  }
+
+  Status = pxe_stop (snp);
+
+ON_EXIT:
+  gBS->RestoreTPL (OldTpl);
+
+  return Status;
+}